/Engine/Source/Runtime/Core/Public/Misc/StringFormatter.h
Format the specified string using the specified arguments. Replaces instances of { Argument } with keys in the map matching 'Argument'
A string containing the formatted text
[FString](API\Runtime\Core\Containers\FString) Format ( const TCHAR * InExpression, const [TMap](API\Runtime\Core\Containers\TMap)< [FString](API\Runtime\Core\Containers\FString), [FStringFormatArg](API\Runtime\Core\Misc\FStringFormatArg) > & InArgs ) const